Shuttle changing mechanism for weaving looms



Dec. 24, 1957 E. A. BUTlN 2,8

SHUTTLE CHANGING MECHANISM FOR NEAN NG LOOMS Filed March a, 1954 s Sheets-Sheet 1 r p k k N Q N J 2 k 0 0 o O g a v Q| Q a a a k v: Q

Dec. 24, 1957 E. A. BUTlN 2,817,370

' SHUTTLE CHANGING MECHANISM FOR WEAVING LOOMS Filed March 8, 1954 3 Sheets-Sheet 2 v Dec. 24, 1957 E. BUTlN I 2,817,

SHUTTLE CHANGING MECHANISM FOR WEAVING LOOMS Y Filed March 8, 1954 s Sheets-Sheet s 2,81 7,3 79 Patented Dec. 24, 1957 had SHUTTLE CHANGING MECHANISM FOR WEAVING LOOMS Emile Achille Butin, Lyon, France Application March 8, 1954, Serial No. 414,819 Claims priority, application France March 24, 1953 4 Claims. (Cl. 139239) the loom, through the axial shifting of a camshaft so as to make the cams on said camshaft register with the parts to be controlled thereby in order to produce in the According to this prior arrangement, the change of shuttle forms a cycle which is executed during two successive revolutions of the crankshaft, i. e. during two batten strokes.

This arrangement has already been. improved. as disclosed in my French 1952, in a manner such that the movements feeding and positioning a fresh full shuttle are slowed down and spread out over four batten strokes, the actual shuttle change being executed during two strokes while the preceding two strokes correspond toa lowering of the spare shuttle out of its casing and to its positioning above the opening shuttle-box on the loom.

To this end, the camshaft of the, shuttle-changing mechanism executes at the moment of its release a comthe latter, which reduces the inertia of the moving masses; the box opens no longer towards the front of the loom but rearwardly and is held in its closed position through the locking, on a transverse rod, of, two parallel levers controlled by two arms which are interconnected by a transverse member engaging a slope rigid with an extension of the batten, said arms being pivo'tally secured to a rod controlled by a pivoting. lever adapted. to be engaged by a cam controlling the opening of the shuttlebox through said arms after a translational movement of the camshaft carrying said cam at the moment of a change of shuttle.

l have illustrated by way of example and by no means in a limiting sense, a preferred embodiment of my in- I ention. In said drawings:

Fig. l is a general diagrammatic perspective threequarter view of an improved loom of the type described as seen from the front.

Fig. 2 is a perspective View from the rear of the section including the shuttle-box and the parts controlling same.

Figs. 3 and 4 are one reduced scale lateral elevational views of said shuttle-box respectively before and after opening of one latter.

Patent 1,054,627 dated April l9,

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Fig. 5 is a plan view from above of said shuttle box in its closed position.

Turning to Figs. 1, 3 and 4, the shaft 42 carrying the control cams and the shaft 43 carrying various levers are positioned near the lower end of the loom and near the level of the shaft 44 carrying the batten 92 (Figs. 3 and 4), and round which said batten is adapted to rock under the action of the control member 103. Said shafts 42 and 43 are entirely independent of the frame of the loom which includes two uprights 4S pivotally secured to the batten-carrying shaft 44 and inter-connected at their upper ends by the transverse member 46.

Said transverse member 46 serves as a carrier for the shuttle-box which includes a central movable section 83 and two outer stationary sections 85;

With a view to providing for the engagement between said frame 4Ei-46 carrying the shuttle-box and the batten upright 92, the latter is provided with a camshaped member two arms 82 pivotally connected with said shuttle box as described hereinafter.

To the camshaft 42 are secured a number of cams which are, when considered from the left hand side to the right hand side of the front of the loom shown in Fig. 2 and from the right hand to the left hand side of the rear view forming Fig. 2, a cam 47 controlling the feeler which is not illustrated, a cam 51 which serves for resetting purposes, a cam 48 provided for the trans lational movement of the camshaft 42 earryin it a rotation of the camshaft 42 carrying it, and a cam 56 controlling the shifting of the shuttle out of the shuttle holder 101 into the shuttle box.

On the other hand, there are pivotally secured to the lever-carrying shaft 43, the following levers: a lever 57 connected through a rod 58 with the lever 59 controlled by the feeler, a lever 61 connected through a rod 62, 63 controlling the shuttle system, a lever 64 connected through a rod 65 with the pivoting arms 32 controlling the opening of the shuttle box and the disconnection between the frame carrying the latter and the batten. It carries also a lever 66 connected through a rod 67 To another shaft 69 parallel with the precedingly described shafts 42, 43, 44 are keyed a sleeve 71 carryin the roller 72 controlling the translational movement of the shaft 42 through cooperation with the cam 48 a lever 73 connected through a rod 74 with the rocking resetting lever 75 which is released by the feeler at the moment at. which the latter detects a lack of weft and lastly a lever 76 controlling through a rod 77 the opening of the shuttle holder 101 with a View to providing for the lowering of the shuttle into the interval betweenstraps 104 carried by the shaft 68 as described.

The two uprights 45 of the frame are pivotally secured to the batten-carrying shaft 44 together with a crank 102 carrying a roller 96 (Fig. 2).

Said uprights 45 are interconnected by three transverse rods to the rear of the shuttle box 83S5 as shown at respectively 78, 79 and 80 (Fig. 2). The rod 78 forms the pivotal axis for the resetting lever 75 and for the two arms 82 (Figs. 3 and 4) which control the disconnection of the shuttle box with reference to the batten and the opening of the shuttle box. The rod 79 forms the pivotal axis for the shuttle locking lever 63 and for the movable section 83 of the shuttle box, which latter section carries for this purpose lugs 84 pivotally secured to said rod 79. The rod 80 (Figs. 3 and 4) forms lastly a locking member for the movable section 83 of the shuttle box in its closed position.

The stationary section 85 of the shuttle box is rigid with the transverse member 46 interconnecting the two uprights of the frame.

The above-mentioned arms 82 controlling the disconnection of the shuttle box are pivotally secured beyond their pivotal axis formed by the rod '78 (Fig. 3 and 4) to corresponding links 86 connected in their turn, with the rear ends of levers 87, the front ends of which are each pivotally secured at 88 to a lug rigid with the rear surface of the movable section 83 of the shuttle box.

Said levers 87 are submitted to the tractional stress exerted by springs 89 which draw them towards the shuttle box. Each lever 87 is provided with a notch 91 adapted to engage during the closing period of the shuttle box (Fig. 3) the transverse rod 80 so as to provide for the locking of the shuttle box in its closed position.

The arms 82 pivotally connected with the movable section of the shuttle box carry a projection 98 provided with a terminal roller 99 adapted to engage a nose 97 rigid with said movable section 83 of the shuttle box.

The engagement between the uprights 45 of the frame and the above-mentioned upright of the batten 92 is ensured during normal operation of the loom by the arms 82. To this end, the arms 82 are interconnected through their front ends by a rod 93 which is held through engagement with the upper end of the above mentioned cam-shaped member 94 rigid with an angle bar 95 formmg an extension of the batten 92 when no tractional stress is exerted by the rod 65 on said arms 82 through the rod 93 interconnecting the latter.

During normal operation of the loom, i. e. when the operative shuttle carried inside the shuttle box 8385 contains a suflicient provision of weft thread, the camshaft 42 driven into rotation by the toothed wheel 55 engages solely on the one hand the lever 57 through the agency of the cam 47 so as to give the feeler-controlled lever 59 the reciprocating movement providing for the desired detection while, on the other hand, said shaft 42 controls through the cam 52 the lever 61 so as to act on the pivoting lever 63 and to brake thereby the progression of the moving shuttle at the moment at which it enters the shuttle box 83-85.

In contradistinction, when the feeler detects the exhaust of the weft in the shuttle inside the shuttle box, said feeler releases the lever 75 which rocks and releases in its turn the lever 73 through the agency of the rod 74, which allows the shaft 69 to rock by a few degrees round its axis. This rotation allows the roller 72 to engage the sloping groove formed on the side of the cam 48 while the lever 76 exerts a tractional stress on the rod 77.

Since the sleeve 71 carrying the above-mentioned roller 72 cannot be shifted over its shaft 69 which cannot either be shifted laterally, the cam 48 and, consequently, the shaft 42 to which it is secured is shifted laterally against the action of a return spring which is not illustrated in the drawing, so that the camshaft urges all the cams 51, 53, 54, 56 into their operative positions, in which positions said cams engage and control the corresponding levers in the manner disclosed hereinafter.

The adjustment is such that at the moment at which the roller 72 enters the groove formed in the cam 48, the stationary projection 100 carried by the shaft 43 is located in register with the notch formed in the disc, 49.,

4 so that the shaft 42 is allowed a lateral movement as said projection 100 moves through the notch in the disc 49 and enters a position on the other side of the latter. Said disc is thus held in its laterally shifted position during a complete revolution of the shaft 42.

The operation of the cams is now as follows:

In the first place, the cam 53 urges the lever 64 downwardly to make the latter draw in the rod 65 and produce a pivoting movement of the arms 82 round their carrier rod 78', this constrains the rod 93 to slidingly move over the cam-shaped slope 94 on the extension 95 of the batten, which leads in its turn to a release of the frame 45-46 with reference to the batten 92 and allows the latter to pivot rearwardly so as to be positioned underneath the shuttle holder carrying the spare shuttles, said position being illustrated in Fig. 4. The pivotal movement of the arms 82 shifts at the same time the links 86 so as to produce an upwardly directed pivotal movement of the corresponding levers 87 of which the notches 91 are thus shifted away from the rod and thereby release the movable section 83 of the shutter box.

On the other hand, the projections 98 rigid with the arms 82 are lowered under the action of the pivotal movement of said arms 82 and consequently said projections 98 urge through the corresponding rollers 99 the nose 97 downwardly, said nose being rigid with the movable section 83 of the shuttle box which consequently opens rearwardly through a pivotal movement round the spindle 79.

The frame 45-46 associated with the shuttle box 83- being thus released with reference to the batten, is shifted into its rear collapsed position while the movable section 83 of the shuttle box rocks rearwardly so as to allow an easy introduction of a spare shuttle (Fig. 4).

During this time, the roller 96 which has moved in unison with the pivoting upright 45 of the frame round the shaft 44 has abutted against the cam 54 and rolls over the latter, which brakes the frame during its rearwardly directed rocking movement.

As to the cam 56, it lowers the lever 66 which through the linkage 67 produces a rocking of the shaft 68 which carries the stirrups 104 of the shuttle holder; said stirrups are thus adapted to lay a fresh spare shuttle inside the shuttle box which has now stopped in its rear collapsed position, since it is no longer connected with the batten, while the wall of the section 83 of the shuttle box has opened as provided by its rearward shifting so as to further the introduction and laying of the spare shuttle inside the shuttle box, said straps 104 entering corresponding notches 105 (Fig. 2) provided across the wall of the movable section 83.

As a preliminary step and as soon as the feeler has released the auxiliary shaft 69 there is provided as disclosed hereinabove a lowering of the lever 76 which produces through the rod 77 the release of a shuttle out of the shuttle holder 101 into the interval between the stirrups 104 carried by the shaft 68 so that said shuttle is thus shifted towards and laid inside the shuttle box through the agency of said stirrups.

When these different movements have been executed, the cam 51 causes the roller 72 to rise so that said roller disengages the cam 48 at the same time as the consequent rocking movement of the shaft 69 provides for the resetting of the lever 75 through the lever 73 and the rod 74.

At this moment, the notch in the disc 49 lies again in register with the projection and thus releases the camshaft 42 which returns into its starting position un der the action of its return spring which is not illustrated.

In Fig. 1, 101 designates the shuttle holder filled with shuttles ready for operation while 107 designates the channel through which the exhausted shuttles are removed, 108 the container receiving said exhausted shuttles and 109 the driving sword.

What I claim is:

1. In combination with the shuttle-changing mechanism of a loom, the provision of a horizontal batten shaft, a batten carried by said shaft, a frame structure including two parallel struts revolubly carried by the batten shaft and a horizontal transverse member interconnecting the outer ends of said struts, a shuttle-box carried by the said frame structure including terminal sections rigid with the outer end of said structure and a medial collapsible wall element, a camshaft and a lever-carrying shaft extending in parallelism with and in the proximity of the batten shaft and independent of the shuttle-box carrying frame structure, cams rigid with the camshaft and levers rigid with the lever-carrying shaft, said levers and earns being adapted to control the shuttle-changing mechanism, and means whereby the levers and cams on the corresponding shafts control the opening of the medial collapsible wall elements of the shuttle-box.

2. In combination with the shuttle-changing mechanism of a loom, the provision of a horizontal batten shaft, a batten carried by said shaft, a frame structure including two parallel struts revolubly carried by the batten shaft and a horizontal transverse member interconnecting the outer ends of said struts, a shuttle-box carried by the said frame structure including terminal sections rigid with the outer end of said structure and a medial collapsible wall element, said Wall element being adapted to drop outwardly and rearwardly of the shuttle-box, means for locking said collapsible wall element in its operative closed position, a camshaft and a lever-carrying shaft extending in parallelism with and in the proximity of the batten shaft and independent of the shuttle-box carrying frame structure, a cam-shaped member rigid with the outer end of the batten, a leverage controlling the operative engagement of the collapsible Wall element of the shuttlebox and including a member normally engaging the camshaped member to hold the latter and the batten rigid therewith fast with reference to the frame structure, a cam on the camshaft controlling said leverage to release the leverage member and the collapsible wall element of the shuttle-box, further cams on the camshaft, levers carried by the lever-carrying shaft controlled by the lastmentioned cams and adapted to control the shuttlechanging mechanism.

3. In combination with the shuttle-changing mechanism of a loom, the provision of a horizontal batten shaft, a batten carried by said shaft, a frame structure including two parallel struts revolubly carried by the batten shaft and a horizontal transverse member interconnecting the outer ends of said struts, a shuttle-box carried by the said frame structure including terminal sections rigid with the outer end of said structure and a medial collapsible wall element, said wall element being adapted to drop outwardly and rearwardly of the shuttle-box, a part engaging the collapsible wall element of the shuttle-box, locking means normally engaging said part to hold normally the collapsible wall element in its operative shuttlebox closing position, a camshaft and a lever-carrying shaft extending in parallelism with and in the proximity of the batten shaft and independent of the shuttle-box carrying frame structure, a cam-shaped member rigid with the outer end of the batten, at least one arm pivoting round a point of the frame structure and adapted to release said locking means when urged out of its normal angular setting, a

horizontal rod rigid with the front end of said arm and adapted normally to engage a section of the cam-shaped member to rigidly secure the frame structure to the batten, a cam on the camshaft, a lever on the lever-carrying shaft controlled by said cam and controlling said pivoting arm away from its normal angular setting into an inoperative position for which the last mentioned horizontal rod disengages the cam-shaped member, to release both the frame structure and the locking means, further cams on the camshaft, levers carried by the lever-carrying shaft controlled by last mentioned cams and adapted to control the shuttle-changing mechanism.

4. In combination with the shuttle-changing mechanism of a loom, the provision of a horizontal batten shaft, a batten carried by said shaft, a frame structure including two parallel struts revolubly carried by the batten shaft and a horizontal transverse member interconnecting the outer ends of said struts, a shuttle-box carried by the said frame structure including terminal sections rigid with the outer end of said structure and a medial collapsible wall element, said wall element being adapted to drop outwardly and rearwardly of the shuttle-box, a part engaging the collapsible wall element of the shuttle-box, locking means normally engaging said part to hold normally the collapsible wall element in its operative shuttleboX closing position, a camshaft and a lever-carrying shaft extending in parallelism with and in the proximity of the batten shaft and independent of the shuttle-box carrying frame structure, a cam-shaped member rigid with the outer end of the batten, two arms pivoting round a horizontal line of the frame structure and adapted to release said locking means when urged out of their normal angular setting, a horizontal rod connecting the front ends of said arms and adapted normally to engage a section of the cam-shaped member to rigidly secure the frame structure to the batten, interengaging projections rigid with the collapsible wall element of the shuttle-box and with the pivoting arms respectively, the relative positions of said projections for the normal angular setting of the pivoting arms corresponding to the closed position of the collapsible wall element, a cam on the camshaft, a lever on the lever-carrying shaft controlled by said cam and adapted to move the pivoting arms away from their normal angular setting into an inoperative position for which the last mentioned horizontal rod disengages the cam-shaped member, to release both the frame structure and the locking means, the shifting of the pivoting arms away from their normal angular setting producing a relative movement of said projections which opens the collapsible wall section of the shuttle-box upon release thereof, further cams on the camshaft, levers carried by the lever-carrying shaft controlled by last-mentioned cams and adapted to control the shuttle-changing mechanism.

References Cited in the file of this patent UNITED STATES PATENTS 637,753 Baker et a1. Nov. 21, 1899 2,493,570 Butin Jan. 3, 1950 FOREIGN PATENTS 508,714 Great Britain July 5, 1939 

